#include <Wire.h>

void setup()
{
  Wire.begin();        // join i2c bus (address optional for master)
  Serial.begin(9600);  // start serial for output
}

void loop()
{
  Wire.requestFrom(72, 2);    

  while(Wire.available()) 
  { 
    int part1 = Wire.read();
    Serial.print("part1  is : ");
    Serial.println(part1,BIN);
    
    int part2 = Wire.read();
    Serial.print("part2  is : ");
    
    part2 &= B10000000;
    part2 >>= 7;
    Serial.println(part2,BIN);
    
    Serial.print("result is : ");
    Serial.println(part1 + part2 * 0.5);
    Serial.println("-----------------");
  }

  delay(500);
}